Patents by Inventor Dong-Uk Choi
Dong-Uk Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11925051Abstract: A display device includes: a first base having a display area; light-emitting elements on the first base; and an encapsulation layer over the light-emitting elements. The encapsulation layer includes: a first inorganic layer; an organic layer on the first inorganic layer; and a second inorganic layer on the organic layer. The first inorganic layer includes: a first buffer layer on the light-emitting elements; a first barrier layer on the first buffer layer; a first porous layer on the first barrier layer; a second barrier layer on the first porous layer; and a second buffer layer on the second barrier layer. A refractive index of the first buffer layer, the first barrier layer, and the first porous layer are different from one another, and the refractive index of the first porous layer is smaller than the refractive index of the first buffer layer and the first barrier layer.Type: GrantFiled: May 7, 2021Date of Patent: March 5, 2024Assignee: Samsung Display Co., Ltd.Inventors: Yong Tack Kim, Eung Seok Park, Jae Hyuk Lee, Yoon Hyeung Cho, Dong Uk Choi
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Patent number: 11818937Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.Type: GrantFiled: December 6, 2021Date of Patent: November 14, 2023Assignee: Samsung Display Co., Ltd.Inventors: Yo Han Kim, Yong Tack Kim, Yoon Hyeung Cho, Jong Jin Park, Deok Chan Yoon, Yun Kyu Lee, Dong Uk Choi
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Publication number: 20220093691Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.Type: ApplicationFiled: December 6, 2021Publication date: March 24, 2022Inventors: Yo Han KIM, Yong Tack KIM, Yoon Hyeung CHO, Jong Jin PARK, Deok Chan YOON, Yun Kyu LEE, Dong Uk CHOI
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Publication number: 20220059799Abstract: A display device includes: a first base having a display area; light-emitting elements on the first base; and an encapsulation layer over the light-emitting elements. The encapsulation layer includes: a first inorganic layer; an organic layer on the first inorganic layer; and a second inorganic layer on the organic layer. The first inorganic layer includes: a first buffer layer on the light-emitting elements; a first barrier layer on the first buffer layer; a first porous layer on the first barrier layer; a second barrier layer on the first porous layer; and a second buffer layer on the second barrier layer. A refractive index of the first buffer layer, the first barrier layer, and the first porous layer are different from one another, and the refractive index of the first porous layer is smaller than the refractive index of the first buffer layer and the first barrier layer.Type: ApplicationFiled: May 7, 2021Publication date: February 24, 2022Inventors: Yong Tack KIM, Eung Seok PARK, Jae Hyuk LEE, Yoon Hyeung CHO, Dong Uk CHOI
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Patent number: 11195884Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.Type: GrantFiled: December 6, 2019Date of Patent: December 7, 2021Assignee: Samsung Display Co., Ltd.Inventors: Yo Han Kim, Yong Tack Kim, Yoon Hyeung Cho, Jong Jin Park, Deok Chan Yoon, Yun Kyu Lee, Dong Uk Choi
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Publication number: 20200258946Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.Type: ApplicationFiled: December 6, 2019Publication date: August 13, 2020Inventors: Yo Han KIM, Yong Tack KIM, Yoon Hyeung CHO, Jong Jin PARK, Deok Chan YOON, Yun Kyu LEE, Dong Uk CHOI
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Patent number: 10290923Abstract: An electronic device is provided. The electronic device includes a housing including a window that forms a first side of the electronic device, and a second side that is disposed opposite to the first side, a touch sensor disposed adjacent to the window and configured to generate a capacitance, an input circuit operably connected to the touch sensor and configured to detect an input based on a variation in the capacitance, an antenna radiator at least one of partially disposed inside the housing and a part of the housing, a ground operably disposed between the first side and the second side, a communication circuit operably connected to the antenna radiator and the ground, and an antenna matching circuit operably connected to the touch sensor and the input circuit.Type: GrantFiled: July 22, 2016Date of Patent: May 14, 2019Assignee: Samsung Electronics Co., LtdInventors: Dong-Uk Choi, Sang-Pil Lee, Jangje Park, Jinu Kim, Bumjin Cho, Inyong Hwang
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Patent number: 10144410Abstract: A hybrid construction machine is disclosed, which comprises an engine, a generator, the generator connected to the engine, a converter connected to the generator, and an ESS (Energy Storage System) connected to the converter. The hybrid construction machine further comprises a converter current detector positioned either between the converter and the generator or between the converter and the ESS to detect the current flowing between the converter and the generator, an ESS current detector positioned between the converter and the ESS to detect the current flowing between the converter and the ESS, a processing unit receiving the current detected from the converter current detector and the ESS current detector and calculating the operation time of the respective component, and a display unit displaying the operation time of the respective component. Since the hybrid construction machine calculates the operation time of the respective component and displays the same to an operator.Type: GrantFiled: April 24, 2014Date of Patent: December 4, 2018Assignee: VOLVO CONSTRUCTION EQUIPMENT ABInventor: Dong-Uk Choi
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Patent number: 9640286Abstract: An apparatus for cooling a spent fuel pool having a heat exchanger includes a cooling water pool positioned above the spent fuel pool; a floating device configured to be elevated according to a water level of a cooling water in the spent fuel pool; and an emergency cooling water supply pipe configured to form a path through which the cooling water of the cooling water pool is moved to the spent fuel pool and configured to include a floating valve that opens or closes a flow passage of the cooling water in connection with the elevation of the floating device.Type: GrantFiled: August 23, 2012Date of Patent: May 2, 2017Assignee: KEPCO NUCLEAR FUEL CO., LTD.Inventors: Sang Jong Lee, Geol Woo Lee, Young Baek Kim, Jae Don Choi, Jae Il Lee, Sung Ju Cho, Jung Seon An, Dong Kyu Lee, Hye Jin Kim, Dong Uk Choi
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Publication number: 20170043758Abstract: A hybrid construction machine is disclosed, which comprises an engine, a generator, the generator connected to the engine, a converter connected to the generator, and an ESS (Energy Storage System) connected to the converter. The hybrid construction machine further comprises a converter current detector positioned either between the converter and the generator or between the converter and the ESS to detect the current flowing between the converter and the generator, an ESS current detector positioned between the converter and the ESS to detect the current flowing between the converter and the ESS, a processing unit receiving the current detected from the converter current detector and the ESS current detector and calculating the operation time of the respective component, and a display unit displaying the operation time of the respective component. Since the hybrid construction machine calculates the operation time of the respective component and displays the same to an operator.Type: ApplicationFiled: April 24, 2014Publication date: February 16, 2017Inventor: Dong-Uk CHOI
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Publication number: 20170033442Abstract: An electronic device is provided. The electronic device includes a housing including a window that forms a first side of the electronic device, and a second side that is disposed opposite to the first side, a touch sensor disposed adjacent to the window and configured to generate a capacitance, an input circuit operably connected to the touch sensor and configured to detect an input based on a variation in the capacitance, an antenna radiator at least one of partially disposed inside the housing and a part of the housing, a ground operably disposed between the first side and the second side, a communication circuit operably connected to the antenna radiator and the ground, and an antenna matching circuit operably connected to the touch sensor and the input circuit.Type: ApplicationFiled: July 22, 2016Publication date: February 2, 2017Inventors: Dong-Uk CHOI, Sang-Pil Lee, Jangje Park, Jinu Kim, Bumjin Cho, Inyong Hwang
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Patent number: 9230761Abstract: An emergency stop system for a hybrid excavator is provided, which includes an emergency switch and an emergency stop unit. In a normal operation state, a power supply that is applied from a power supply unit is provided to a hybrid controller and an engine controller, while when the emergency switch is pressed, the input power supply is intercepted to effectively stop the operation of the hybrid system in the case where equipment abnormality or an emergency situation occurs. Also, when the emergency switch is pressed, the power supply is applied to an emergency alarm unit and an energy discharge unit to notify an operator and neighboring persons of the equipment abnormality and emergency situation occurrence, and a hybrid power source vanishes completely.Type: GrantFiled: July 21, 2010Date of Patent: January 5, 2016Assignee: VOLVO CONSTRUCTION EQUIPMENT ABInventors: Ji-Yun Kim, Eui-Chul Kim, Dong-Uk Choi
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Patent number: 8969713Abstract: Disclosed herein is a photoelectric conversion device having a semiconductor substrate including a front side and back side, a protective layer formed on the front side of the semiconductor substrate, a first non-single crystalline semiconductor layer formed on the back side of the semiconductor substrate, a first conductive layer including a first impurity formed on a first portion of a back side of the first non-single crystalline semiconductor layer, and a second conductive layer including the first impurity and a second impurity formed on a second portion of the back side of the first non-single crystalline semiconductor layer.Type: GrantFiled: January 27, 2012Date of Patent: March 3, 2015Assignee: Samsung SDI Co., Ltd.Inventors: Min-Seok Oh, Jung-Tae Kim, Nam-Kyu Song, Min Park, Yun-Seok Lee, Czang-Ho Lee, Myung-Hun Shin, Byoung-Kyu Lee, Yuk-Hyun Nam, Seung-Jae Jung, Mi-Hwa Lim, Joon-Young Seo, Dong-Uk Choi, Dong-Seop Kim, Byoung-June Kim
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Patent number: 8802972Abstract: Disclosed herein is a photoelectric conversion device having a semiconductor substrate including a front side and back side, a protective layer formed on the front side of the semiconductor substrate, a first non-single crystalline semiconductor layer formed on the back side of the semiconductor substrate, a first conductive layer including a first impurity formed on a first portion of a back side of the first non-single crystalline semiconductor layer, and a second conductive layer including the first impurity and a second impurity formed on a second portion of the back side of the first non-single crystalline semiconductor layer.Type: GrantFiled: June 2, 2009Date of Patent: August 12, 2014Assignee: Samsung SDI Co., Ltd.Inventors: Min-Seok Oh, Jung-Tae Kim, Nam-Kyu Song, Min Park, Yun-Seok Lee, Czang-Ho Lee, Myung-Hun Shin, Byoung-Kyu Lee, Yuk-Hyun Nam, Seung-Jae Jung, Mi-Hwa Lim, Joon-Young Seo, Dong-Uk Choi, Dong-Seop Kim, Byoung-June Kim
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Patent number: 8738239Abstract: A swing control system and method for a construction machine using an electric motor is provided. The swing control system includes a swing electric motor swinging an upper swing structure and a swing control unit.Type: GrantFiled: June 17, 2010Date of Patent: May 27, 2014Assignee: Volvo Construction Equipment Holding Sweden ABInventors: Jong Min Kang, Ahn Kyun Jung, Chun Seung Lee, Ji Yun Kim, Dong Uk Choi, Jung Sun Jo, Sung Kon Kim, Bong Soo Yoo
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Patent number: 8680588Abstract: A field effect transistor includes a buried gate pattern that is electrically isolated by being surrounded by a tunneling insulating film. The field effect transistor also includes a channel region that is floated by source and drain regions, a gate insulating film, and the tunneling insulating film. The buried gate pattern and the tunneling insulating film extend into the source and drain regions. Thus, the field effect transistor efficiently stores charge carriers in the buried gate pattern and the floating channel region.Type: GrantFiled: February 26, 2008Date of Patent: March 25, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Ming Li, Dong-Uk Choi, Chang-Woo Oh, Dong-Won Kim, Min-Sang Kim, Sung-Hwan Kim, Kyoung-Hwan Yeo
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Patent number: 8666613Abstract: A swing control system for a hybrid construction machine has a swing operating lever, an electric swing motor, a speed detection sensor which detects the rotary speed of a swing motor, a controller that calculates the driving speed of the swing motor by a swing operating signal created by the operation of the swing operating lever and by a detecting signal of the rotary speed, an inverter which drives the swing motor by a control signal from the controller, a swing inertia detector that detects the swing inertia of equipment and an inertia torque compensator which compares the torque compensation value in accordance with the equipment inertia, and outputs a calculated torque value for controlling the swing motor to the inverter.Type: GrantFiled: December 15, 2010Date of Patent: March 4, 2014Assignee: Volvo Construction Equipment ABInventor: Dong-Uk Choi
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Publication number: 20130311054Abstract: A swing control system for a hybrid construction machine has a swing operating lever, an electric swing motor, a speed detection sensor which detects the rotary speed of a swing motor, a controller that calculates the driving speed of the swing motor by a swing operating signal created by the operation of the swing operating lever and by a detecting signal of the rotary speed, an inverter which drives the swing motor by a control signal from the controller, a swing inertia detector that detects the swing inertia of equipment and an inertia torque compensator which compares the torque compensation value in accordance with the equipment inertia, and outputs a calculated torque value for controlling the swing motor to the inverter.Type: ApplicationFiled: December 15, 2010Publication date: November 21, 2013Applicant: Volvo Construction Equipment ABInventor: Dong-Uk Choi
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Patent number: 8455344Abstract: A non-volatile memory device includes field insulating layer patterns on a substrate to define an active region of the substrate, upper portions of the field insulating layer patterns protruding above an upper surface of the substrate, a tunnel insulating layer on the active region, a charge trapping layer on the tunnel insulating layer, a blocking layer on the charge trapping layer, first insulating layers on upper surfaces of the field insulating layer patterns, and a word line structure on the blocking layer and first insulating layers.Type: GrantFiled: September 21, 2011Date of Patent: June 4, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Suk-Kang Sung, Choong-Ho Lee, Dong-Uk Choi, Hee-Soo Kang
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Publication number: 20130119784Abstract: An emergency stop system for a hybrid excavator is provided, which includes an emergency switch and an emergency stop unit. In a normal operation state, a power supply that is applied from a power supply unit is provided to a hybrid controller and an engine controller, while when the emergency switch is pressed, the input power supply is intercepted to effectively stop the operation of the hybrid system in the case where equipment abnormality or an emergency situation occurs. Also, when the emergency switch is pressed, the power supply is applied to an emergency alarm unit and an energy discharge unit to notify an operator and neighboring persons of the equipment abnormality and emergency situation occurrence, and a hybrid power source vanishes completely.Type: ApplicationFiled: July 21, 2010Publication date: May 16, 2013Applicant: VOLVO CONSTRUCTION EQUIPMENT ABInventors: Ji-Yun Kim, Eui-Chul Kim, Dong-Uk Choi